On Sun, 16 Jan 2005 12:53:04 -0500, Steve wrote:
>I have 80 and 40 meter dipoles on a common center insulator. They are
>fed with about 60 ft of open wire transmission line whose characteristic
>impedance is about 500 ohms. I'd like to use this antenna on 160 meters
>and am looking to do so with an antenna tuner that has only 50 ohm
See my webpage for a detailed description of how I do it. The autotuners in my
K2/100 and my TS850 are able to tune this. When I use it with a power amp, I
tune it with a TenTec 229B. It's far from being an ideal antenna for 160, but
works. Nothing new -- this is a less than ideal version of what is described in
Fig 21-2.1b of the current version of Kraus "Antennas for All Applications"
(third edition). I don't have an older version of the book, but my guess is
this drawing is at least 40 years old.
Jim Brown K9YC
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
TowerTalk mailing list